WO2015180118A1 - Terminal device, and method for fixing or unlocking function card of terminal device - Google Patents

Abstract

Disclosed are a terminal device, and method for fixing or unlocking a function card of the terminal device. The terminal device comprises a card container, a fixing device and a processor. The card container is used to receive the function card, and is provided with a card opening; the fixing device comprises a flexible part, and the flexible part extends into the card opening to fix the card container or leaves the card opening to unlock the card container; and the processor is used to determine, according to the authentication information inputted by a user, whether the authentication information is correct; if yes, then the flexible part controlling the fixing device extends into the card opening to fix the card container or leaves the card opening to unlock the card container. In the method, the function card can be removed only when the inputted authentication information is correct, thus preventing the function card from being randomly removed.

Description

Method for fixing or unlocking a function card of a terminal device and a terminal device

[Technical Field]

The present application relates to the field of communications technologies, and in particular, to a method for fixing or unlocking a function card of a terminal device and a terminal device.

 【Background technique】

Existing terminal devices are generally provided with function cards, such as smart cards, memory cards, and the like. The smart card stores information of the digital mobile phone customer, the encrypted key, and the user's phone book, and the user's data is stored on the memory card. Today's feature cards are free to be removed. However, in some cases, the user does not want the function card to be freely detachable. For example, after the user's terminal is stolen, if the thief is free to replace the smart card, the stolen phone can be freely used, causing the user's loss.

 [Summary of the Invention]

The embodiment of the invention provides a method for fixing or unlocking a function card of a terminal device and a terminal device, which can fix or unlock the function card to prevent the function card from being arbitrarily disassembled.

The first aspect of the present application provides a terminal device, where the terminal device includes a card container, a fixing device, and a processor, wherein: the card container is configured to receive a function card, and the card container is provided with a bayonet; The fixing device includes a telescopic portion, the telescopic portion extending into the bayonet to fix the card container or the card slot to unlock the card container, and the processor is configured to determine, according to the authentication information input by the user, Whether the authentication information is correct. When the authentication information is correct, the telescopic portion of the fixing device is controlled to extend into the bayonet to fix the card container or to leave the card slot to unlock the card container.

In conjunction with the first aspect, in a first possible implementation of the first aspect of the present application, the fixing device further includes a defining portion, the defining portion defining a degree of freedom of the telescopic portion, such that the telescopic portion is along In the direction of the bayonet, the telescopic portion protrudes into the bayonet to fix the card container or to leave the card slot to unlock the card container under the control of the processor.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect of the present application, the defining portion is a nut, the telescopic portion includes an electric motor and a screw, and one end of the screw is connected The electric motor, under the control of the processor, drives the screw to move in the nut, so that the screw protrudes into the bayonet or leaves the bayonet.

In conjunction with the first possible implementation of the first aspect, in the third possible implementation of the first aspect of the present application, the defining portion is a defining ring, the telescopic portion includes an electromagnetic coil and a magnetic rod, and the magnetic One end of the rod is connected to the electromagnetic coil, and the electromagnetic coil drives the magnetic rod to move in the limiting ring under the control of the processor, so that the magnetic rod extends into the bayonet or leaves the card mouth.

In conjunction with the first aspect, in a fourth possible implementation of the first aspect of the present application, the fixing device further includes a spring and an electromagnetic coil, the defining portion is a locking tongue, and one end of the locking tongue has a slope, The other end of the bolt is connected to the spring by an electromagnetic coil; when the card container moves, the slope of the bolt abuts against the card container, so that the spring is elastically deformed, and the bayonet is When the locking tongues are opposite, under the action of the spring, the locking tongue extends into the bayonet to fix the card container; the processor is configured to control the expansion and contraction of the fixing device Fixing the card container into the card slot or unlocking the card container from the card slot, specifically: the electromagnetic coil magnetizes the locking tongue under the control of the processor, thereby generating a magnetic force, The locking tongue leaves the bayonet to unlock the card container.

With reference to the first aspect, and the first to fourth possible implementation manners of the first aspect, in the fifth possible implementation manner of the first aspect, the authentication information input by the user is a password input by the user, At least one of fingerprint information and iris information input by the user.

With reference to the first aspect, and the first to fifth possible implementation manners of the first aspect, in the sixth possible implementation manner of the first aspect, the function card is a SIM card, a USIM card, an SD card, and Any of the TF cards.

With reference to the first aspect, and the first to sixth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, the terminal device is a mobile phone, a tablet, a wearable device, or a digital device. camera.

The second aspect of the present application provides a method for fixing or unlocking a function card of a terminal device, where the terminal device includes a card container and a fixing device, wherein the card container is configured to receive the function card, and the card container Opening a bayonet; the fixing device includes a telescopic portion, the telescopic portion extending into the bayonet to fix the card container or from the bayonet to unlock the card container; the method comprises: receiving user input Authentication information; determining whether the authentication information input by the user is correct; if the authentication information input by the user is correct, controlling the expansion and contraction portion of the fixing device to extend into the bayonet to fix the card container or leave the card The mouth unlocks the card container.

In conjunction with the second aspect, in a first possible embodiment of the second aspect of the present application, the fixing device further includes a defining portion, the defining portion defining a degree of freedom of the telescopic portion, such that the telescopic portion is along the The movement of the bayonet direction, wherein the defining portion is a nut, the telescopic portion comprises an electric motor and a screw, one end of the screw is connected to the electric motor, and the telescopic portion for controlling the fixing device extends into the bayonet The step of fixing the card container or leaving the card slot to unlock the card container is specifically: controlling the motor to drive the screw to move in the nut, so that the screw extends into the bayonet to fix the card container Or unlock the card container from the bayonet.

In conjunction with the second aspect, in a second possible implementation of the second aspect of the present application, the fixing device further includes a defining portion, the defining portion defining a degree of freedom of the telescopic portion, such that the telescopic portion is along the The movement of the bayonet direction, wherein the defining portion is a defining ring, the telescopic portion comprises an electromagnetic coil and a magnetic rod, one end of the magnetic rod is connected to the electromagnetic coil, and the telescopic extension of the fixing device is controlled The step of fixing the card container into the card slot or unlocking the card container from the card slot is specifically: controlling the electromagnetic coil to drive the magnetic rod to move in the limiting ring, thereby causing the magnetic rod Extending into the bayonet secures the card container or exits the bayonet to unlock the card container.

In conjunction with the second aspect, in a third possible implementation manner of the second aspect of the present application, the fixing device further includes a spring and an electromagnetic coil, the telescopic portion is a locking tongue, and one end of the locking tongue has a slope, the locking tongue The other end is connected to the spring by the electromagnetic coil; when the card container moves, the slope of the bolt abuts against the card container, so that the spring is elastically deformed, and the bayonet is When the locking tongues are opposite, under the action of the spring, the locking tongue extends into the bayonet to fix the card container; and the telescopic portion that controls the fixing device extends into the bayonet fixing station The step of unlocking the card container or leaving the card slot to unlock the card container is specifically: controlling the electromagnetic coil, magnetizing the locking tongue, thereby generating a magnetic force, and the locking tongue leaves the bayonet under the action of the magnetic force Unlock the card container.

In the above solution, the card container is provided with a bayonet, and when the authentication information is correct, the telescopic portion of the control fixture extends into the bayonet fixing card container or leaves the bayonet unlocking card container. In this way, the function card can be removed only when the authentication information is correct, thereby preventing the function card from being disassembled at will.

 [Description of the Drawings]

1 is a schematic structural diagram of an embodiment of a terminal device of the present application;

2 is a schematic diagram of a specific embodiment of the terminal device shown in FIG. 1;

3 is a schematic diagram of another specific embodiment of the terminal device shown in FIG. 1;

4 is a schematic structural diagram of another embodiment of a terminal device of the present application;

FIG. 5 is a schematic diagram of a fixed state of another embodiment of the terminal device of the present application; FIG.

FIG. 6 is a flowchart of an embodiment of a method for fixing or unlocking a function card of a terminal device of the present application.

 【detailed description】

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an embodiment of a terminal device according to the present application. The terminal device can be a mobile phone, a tablet, a wearable device, or a digital camera. The terminal device of the present embodiment includes a card container 110, a fixing device 120, and a processor 130.

The card container 110 is configured to receive a function card, and the card container 110 is provided with a bayonet 111. The function card may be any one of a SIM card, a USIM card, an SD card, and a TF card.

The fixing device 120 includes a telescopic portion 123, the telescopic portion 123 extending into the bayonet 111 to fix the card container 110 or the card slot 111 to unlock the card container 110;

The processor 130 is configured to determine, according to the authentication information input by the user, whether the authentication information is correct, and when the authentication information is correct, control the expansion and contraction portion 123 of the fixing device 120 to extend into the bayonet 111 fixing the card container 110 or leaving the card slot 111 to unlock the card container 110.

In the above solution, the card container 110 is provided with a bayonet 111. When the authentication information is correct, the processor 130 controls the telescopic portion 123 of the fixing device 120 to extend into the bayonet 111 to fix the card container 110 or to unlock from the bayonet 111. Card container 110. In this way, the function card can be removed only when the authentication information is correct, thereby preventing the function card from being disassembled at will.

Further, the fixing device 120 further includes a defining portion 121 for defining the degree of freedom of the telescopic portion 123 such that the telescopic portion 123 moves in the direction of the bayonet 111.

The processor 130 can be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, or a transistor logic device, a discrete hardware component.

Further, the terminal device may further include a memory 140, which may be a device that can still save data in the case of power failure, and the storage information may be saved in the memory 140. Memory 140 can include read only memory and random access memory and provides instructions and data to processor 130. A portion of the memory 140 may also include non-volatile random access memory (NVRAM).

When fixed, the user first inserts the function card into the card container 110, and then inserts the card container 110 into the terminal device. The user enters authentication information. The processor 130 compares with the authentication information held by the memory 140 according to the authentication information to determine whether the authentication information is correct. When the authentication information is correct, the processor 130 controls the expansion and contraction portion 123 of the fixing device 120 to extend into the bayonet 111 to fix the card container 110. Thereby the card container 110 and the function card cannot be removed.

When unlocked, the user enters authentication information. The processor 130 receives the input authentication information and compares it with the authentication information held by the memory 140 to determine whether the authentication information is correct. When it is determined that the authentication information is correct, the processor 130 controls the expansion and contraction portion 123 of the fixing device 120 to release the card container 110 from the bayonet 111. Thereby the card container 110 and the function card can be removed.

In the above solution, the card container is provided with a bayonet, and when the authentication information is correct, the telescopic portion of the fixing device is controlled to extend into the bayonet fixing card container or to leave the bayonet unlocking card container. In this way, the function card can only be removed when the password is entered correctly, thus preventing the function card from being disassembled at will.

Please refer to FIG. 1 and FIG. 2 together. FIG. 2 is a schematic diagram of a specific embodiment of the terminal device shown in FIG. 1. The limiting portion 121 is a nut 221 , and the expansion and contraction portion 123 includes a motor 223 and a screw 225 . One end of the screw 225 is connected to the motor 223.

When fixed, the user first inserts the function card into the card container 110, and then inserts the card container 110 into the terminal device. The user then enters the authentication information. The processor 130 compares the authentication information input by the user with the authentication information in the memory 140 to determine whether the authentication information is correct. When the authentication information is correct, the motor 223 drives the screw 225 under the control of the processor 130. The nut 221 moves so that the screw 225 extends into the bayonet 111.

When unlocked, the user enters authentication information. The processor 130 receives the input authentication information and compares it with the authentication information in the memory 140. When it is judged that the input authentication information is correct, the motor 223 drives the screw 225 to move in the nut 221 under the control of the processor 130, thereby causing the screw 225 to move away from the bayonet 111.

Please refer to FIG. 1 and FIG. 3 together. FIG. 3 is a schematic diagram of another specific embodiment of the terminal device shown in FIG. 1. The limiting portion 121 is a limiting ring 321 . The elastic portion 123 includes an electromagnetic coil 323 and a magnetic rod 325 . One end of the magnetic rod 325 is connected to the electromagnetic coil 323 .

When fixed, the user first inserts the function card into the card container 110, and then inserts the card container 110 into the terminal device. The user enters authentication information. The processor 130 compares the authentication information input by the user with the authentication information in the memory 140 to determine whether the authentication information is correct. When the authentication information is correct, the electromagnetic coil 323 moves the magnetic rod 325 in the defining ring 321 under the control of the processor 130, so that the magnetic rod 321 protrudes into the bayonet 111.

When unlocked, the user enters authentication information. The processor 130 receives the input authentication information and compares it with the authentication information in the memory 140 to determine whether the authentication information is correct. When it is determined that the input authentication information is correct, the electromagnetic coil 323 drives the magnetic rod 325 to move in the limiting ring 321 under the control of the processor 130, thereby moving the magnetic rod 321 away from the bayonet 111.

Referring to FIG. 4 and FIG. 5, FIG. 4 is a schematic structural diagram of another embodiment of a terminal device according to the present application. FIG. 5 is a schematic diagram of a fixed state of another embodiment of the terminal device of the present application. The terminal device of the present embodiment includes a card container 410, a fixing device 420, and a processor 430.

The card container 410 is configured to receive a function card, and the function card 410 is provided with a bayonet 411.

The fixing device 420 includes a spring 421, an electromagnetic coil 422, and a locking tongue 423. Among them, the locking tongue 423 is a telescopic portion. One end of the locking tongue 423 has a slope 424, and the other end of the locking tongue 423 is connected to the spring 421 via a solenoid 422.

Processor 430 can be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic device, or a transistor logic device, a discrete hardware component.

When fixed, the user first inserts the function card into the card container 410, and then inserts the card container 410 into the terminal device. As shown in FIG. 4, during insertion of the card container 410 into the terminal device, the slope 424 of one end of the locking tongue 423 abuts against the edge of the non-bayonet of the card container 410. The card container 410 produces a downward thrust on the ramp 424. One end of the locking tongue 423 causes the spring 421 to elastically deform under the action of the thrust. And when the card container 410 moves to a position where the bayonet 411 is opposite to one end of the locking tongue 423, the locking tongue 423 loses the force against the card container 410, and the locking tongue 423 extends into the bayonet 411 by the action of the spring 421. The card container 410 and the function card in the card container 410 cannot be removed.

When unlocked, the user enters authentication information. The processor 430 receives the input authentication information and compares it with the authentication information in the memory 440 to determine whether the authentication information is correct. When it is determined that the input authentication information is correct, the electromagnetic coil 422 magnetizes the lock tongue under the control of the processor 430 to generate a magnetic force. As shown in FIG. 5, under the action of the magnetic force, the lock tongue 423 leaves the bayonet 411. Thereby the card container 410 is unlocked. The electromagnetic coil 422 can be an electromagnet coil.

The memory 440 can be a device that can still save data in the case of power failure. Memory 440 can include read only memory and random access memory and provides instructions and data to processor 430. A portion of memory 440 may also include non-volatile random access memory (NVRAM).

In the above solution, the card container 410 is provided with a bayonet 411. When the authentication information is correct, the processor 430 controls the electromagnetic coil to magnetize the bolt, thereby generating a magnetic force, and the bolt is separated by the magnetic force. The bayonet, thereby unlocking the card container. In this way, the function card can only be unlocked when the authentication information is correct, thereby preventing the function card from being disassembled at will.

The authentication information in the foregoing embodiment may be a password, fingerprint information, or iris information. Wherein, the password can be any combination of letters, numbers and logos.

Referring to FIG. 6, FIG. 6 is a flowchart of an embodiment of a method for fixing or unlocking a function card of a terminal device of the present application. The method for fixing or unlocking the function card of the terminal device of this embodiment includes:

S601: The terminal device receives the authentication information input by the user. The terminal device may be a mobile phone, a tablet, a wearable device or a digital camera.

When fixed, the user first inserts the function card into the card container, and then inserts the card container into the terminal device. The user then enters the authentication information. The terminal device receives the authentication information input by the user. The function card may be any one of a SIM card, a USIM card, an SD card, and a TF card. The authentication information input by the user may be at least one of a password input by the user, fingerprint information input by the user, and iris information. The password can be any combination of letters, numbers, and logos.

S602: The terminal device determines whether the authentication information input by the user is correct.

The processor receives the input authentication information and compares it with the authentication information in the memory to determine whether the authentication information is correct.

S603: If the authentication information input by the user is correct, the telescopic portion of the control fixture extends into the bayonet fixing card container or leaves the bayonet unlocking card container.

Specifically, in an embodiment, if the fixing device further includes a defining portion, the defining portion may define a degree of freedom of the telescopic portion such that the telescopic portion moves along the direction of the bayonet, and then the fixed control is performed when the authentication information input by the user is correct. The telescoping portion extends into the bayonet fixing card container or leaves the bayonet to unlock the card container.

In another specific embodiment, if the defining portion is a nut, the telescopic portion includes an electric motor and a screw, and one end of the screw is connected to the motor, and when the authentication information received by the user is correct, the motor is controlled to drive the screw to move in the nut, thereby The screw extends into the bayonet or leaves the bayonet; if the defining portion is a limiting ring, the telescopic portion includes an electromagnetic coil and a magnetic rod, and one end of the magnetic rod is connected to the electromagnetic coil, and when the authentication information received by the user is correct, the electromagnetic coil is controlled to drive The magnetic rod moves in the defining ring such that the magnetic rod extends into or out of the bayonet.

In another embodiment, if the securing means comprises a spring, an electromagnetic coil and a locking tongue, wherein the locking tongue is a telescoping portion. One end of the locking tongue has a sloped surface, and the other end of the locking tongue is connected to the spring by an electromagnetic coil; when the card container moves, the inclined surface of the locking tongue abuts against the card container, so that the spring is elastically deformed, when the bayonet is opposite to the locking tongue, Under the action of the spring, the locking tongue is inserted into the bayonet to fix the card container. When unlocking, if the input authentication information is correct, the electromagnetic coil is controlled to magnetize the locking tongue, thereby generating a magnetic force, and under the action of the magnetic force, the locking tongue leaves the bayonet, thereby unlocking the card container.

In the above solution, the card holder is provided with a bayonet, and when the input authentication information is correct, the fixing device is controlled to unlock or fix the card container through the bayonet. In this way, the function card can only be disassembled when the authentication information is input correctly, thereby preventing the function card from being disassembled at will.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device implementations described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.

If the integrated unit is implemented as a software functional unit and sold or used as a standalone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM, Read-Only) Memory, random access memory (RAM), disk or optical disk, and other media that can store program code.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (12)

1. A terminal device, characterized in that the terminal device comprises a card container, a fixing device and a processor, wherein:

   The card container is configured to receive a function card, and the card container is provided with a bayonet;

   The fixing device includes a telescopic portion, the telescopic portion extending into the bayonet to fix the card container or from the bayonet to unlock the card container;

   The processor is configured to determine, according to the authentication information input by the user, whether the authentication information is correct, and when the authentication information is correct, controlling the expansion and contraction portion of the fixing device to extend into the bayonet to fix the The card container or the bayonet is unlocked to unlock the card container.
2. The terminal device according to claim 1, wherein the fixing device further comprises a defining portion, the defining portion defining a degree of freedom of the telescopic portion, such that the telescopic portion moves along the bayonet direction, The telescoping portion extends under the control of the processor, extends into the bayonet to fix the card container or leaves the bayonet to unlock the card container.
3. The terminal device according to claim 2, wherein the defining portion is a nut, the telescopic portion includes an electric motor and a screw, one end of the screw is coupled to the motor, and the motor is controlled by the processor And driving the screw to move in the nut, so that the screw extends into the bayonet to fix the card container or to leave the card slot to unlock the card container.
4. The terminal device according to claim 2, wherein the defining portion is a defining ring, the telescopic portion includes an electromagnetic coil and a magnetic rod, and one end of the magnetic rod is connected to the electromagnetic coil, and the electromagnetic coil is Under the control of the processor, the magnetic rod is moved in the defining ring, so that the magnetic rod extends into the bayonet or leaves the bayonet.
5. The terminal device according to claim 1, wherein the fixing device further comprises a spring and an electromagnetic coil, the telescopic portion is a locking tongue, one end of the locking tongue has a slope, and the other end of the locking tongue passes An electromagnetic coil is coupled to the spring;

   When the card container moves, the slope of the locking tongue abuts against the card container, so that the spring is elastically deformed, and when the bayonet is opposite to the bolt, under the action of the spring Inserting the locking tongue into the bayonet to fix the card container;

   The processor is configured to control the expansion and contraction portion of the fixing device to extend into the bayonet to fix the card container or to leave the card slot to unlock the card container, specifically:

   The electromagnetic coil magnetizes the locking tongue under the control of the processor to generate a magnetic force, and under the action of the magnetic force, the locking tongue leaves the bayonet to unlock the card container.
6. The terminal device according to any one of claims 1-5, wherein the authentication information input by the user is at least one of a password input by the user, fingerprint information input by the user, and iris information.
7. The terminal device according to any one of claims 1 to 6, wherein the function card is any one of a SIM card, a USIM card, an SD card, and a TF card.
8. The terminal device according to any one of claims 1 to 7, wherein the terminal device is a mobile phone, a tablet, a wearable device or a digital camera.
9. A method for fixing or unlocking a function card of a terminal device, wherein the terminal device comprises a card container and a fixing device, wherein the card container is configured to receive the function card, and the card container is opened a fixing device, comprising: a telescopic portion, the telescopic portion extending into the bayonet to fix the card container or leaving the bayonet to unlock the card container;

   The method includes:

   Receiving authentication information input by the user;

   Determining whether the authentication information input by the user is correct;

   If the authentication information input by the user is correct, the telescopic portion of the fixing device is controlled to extend into the bayonet to fix the card container or to leave the card slot to unlock the card container.
10. The method according to claim 9, wherein the fixing device further comprises a defining portion, the defining portion defining a degree of freedom of the telescopic portion such that the telescopic portion moves along the bayonet direction, wherein The defining portion is a nut, the telescopic portion includes an electric motor and a screw, one end of the screw is connected to the electric motor, and the telescopic portion that controls the fixing device extends into the bayonet to fix the card container or leave The step of unlocking the card container by the bayonet is specifically as follows:

    Controlling the motor to drive the screw to move in the nut, such that the screw extends into the bayonet to fix the card container or to leave the card slot to unlock the card container.
11. The method according to claim 9, wherein the fixing device further comprises a defining portion, the defining portion defining a degree of freedom of the telescopic portion such that the telescopic portion moves along the bayonet direction, wherein The defining portion is a defining ring, the telescopic portion includes an electromagnetic coil and a magnetic rod, one end of the magnetic rod is connected to the electromagnetic coil, and the telescopic portion for controlling the fixing device extends into the bayonet fixing station The step of unlocking the card container or leaving the card slot to unlock the card container is specifically as follows:

    The electromagnetic coil is controlled to move the magnetic rod in the defining ring such that the magnetic rod extends into the bayonet to fix the card container or to disengage the card container from the bayonet.
12. The method according to claim 9, wherein the fixing means further comprises a spring and an electromagnetic coil, the telescopic portion is a locking tongue, one end of the locking tongue has a slope, and the other end of the locking tongue passes the electromagnetic a coil is coupled to the spring; when the card container moves, a slope of the bolt abuts against the card container, thereby causing the spring to elastically deform, when the bayonet is opposite to the bolt Holding the locking tongue into the bayonet to fix the card container under the action of the spring;

    The step of controlling the expansion and contraction of the fixing device to extend into the bayonet to fix the card container or to leave the bayonet to unlock the card container is as follows:

    The solenoid is controlled to magnetize the bolt to generate a magnetic force, and the lock tongue releases the card container away from the bayonet by the magnetic force.